Frontiers of Optoelectronics最新文献_第7页

Stable PbS colloidal quantum dot inks enable blade-coating infrared solar cells. 稳定的PbS胶体量子点油墨能够实现红外太阳能电池的刀片涂层。

IF 5.4 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-10-26 DOI: 10.1007/s12200-023-00085-0

Xinzhao Zhao, Mingyu Li, Tianjun Ma, Jun Yan, Gomaa Mohamed Gomaa Khalaf, Chao Chen, Hsien-Yi Hsu, Haisheng Song, Jiang Tang

{"title":"Stable PbS colloidal quantum dot inks enable blade-coating infrared solar cells.","authors":"Xinzhao Zhao, Mingyu Li, Tianjun Ma, Jun Yan, Gomaa Mohamed Gomaa Khalaf, Chao Chen, Hsien-Yi Hsu, Haisheng Song, Jiang Tang","doi":"10.1007/s12200-023-00085-0","DOIUrl":"10.1007/s12200-023-00085-0","url":null,"abstract":"Infrared solar cells are more effective than normal bandgap solar cells at reducing the spectral loss in the near-infrared region, thus also at broadening the absorption spectra and improving power conversion efficiency. PbS colloidal quantum dots (QDs) with tunable bandgap are ideal infrared photovoltaic materials. However, QD solar cell production suffers from small-area-based spin-coating fabrication methods and unstable QD ink. Herein, the QD ink stability mechanism was fully investigated according to Lewis acid-base theory and colloid stability theory. We further studied a mixed solvent system using dimethylformamide and butylamine, compatible with the scalable manufacture of method-blade coating. Based on the ink system, 100 cm2 of uniform and dense near-infrared PbS QDs (~ 0.96 eV) film was successfully prepared by blade coating. The average efficiencies of above absorber-based devices reached 11.14% under AM1.5G illumination, and the 800 nm-filtered efficiency achieved 4.28%. Both were the top values among blade coating method based devices. The newly developed ink showed excellent stability, and the device performance based on the ink stored for 7 h was similar to that of fresh ink. The matched solvent system for stable PbS QD ink represents a crucial step toward large area blade coating photoelectric devices.","PeriodicalId":12685,"journal":{"name":"Frontiers of Optoelectronics","volume":"16 1","pages":"27"},"PeriodicalIF":5.4,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10602987/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50161455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Widely tunable and high resolution mid-infrared laser based on BaGa₄Se₇ optical parametric oscillator. 基于BaGa4Se7光学参量振荡器的宽调谐高分辨率中红外激光器。

IF 5.4 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-09-26 DOI: 10.1007/s12200-023-00077-0

Qing Ye, Hui Kong, Jintian Bian, Jiyong Yao, Enlong Wang, Yunlong Wu, Haiping Xu, Kaihua Wen, Yihua Hu

引用次数: 0

Inorganic A-site cations improve the performance of band-edge carriers in lead halide perovskites. 无机A位阳离子改善了卤化铅钙钛矿中带边载流子的性能。

IF 5.4 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-09-25 DOI: 10.1007/s12200-023-00078-z

Cheng Wang, Yaoguang Rong, Ti Wang

引用次数: 0

Massive and parallel 10 Tbit/s physical random bit generation with chaotic microcomb. 大规模并行的10Tbit/s物理随机比特生成与混沌微梳。

IF 5.4 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-09-22 DOI: 10.1007/s12200-023-00081-4

Yuqi Hu, Qingsong Bai, Xi Tang, Wei Xiong, Yilu Wu, Xin Zhang, Yanlan Xiao, Runchang Du, Leiji Liu, Guangqiong Xia, Zhengmao Wu, Junbo Yang, Heng Zhou, Jiagui Wu

{"title":"Massive and parallel 10 Tbit/s physical random bit generation with chaotic microcomb.","authors":"Yuqi Hu, Qingsong Bai, Xi Tang, Wei Xiong, Yilu Wu, Xin Zhang, Yanlan Xiao, Runchang Du, Leiji Liu, Guangqiong Xia, Zhengmao Wu, Junbo Yang, Heng Zhou, Jiagui Wu","doi":"10.1007/s12200-023-00081-4","DOIUrl":"10.1007/s12200-023-00081-4","url":null,"abstract":"Ultrafast physical random bit (PRB) generators and integrated schemes have proven to be valuable in a broad range of scientific and technological applications. In this study, we experimentally demonstrated a PRB scheme with a chaotic microcomb using a chip-scale integrated resonator. A microcomb contained hundreds of chaotic channels, and each comb tooth functioned as an entropy source for the PRB. First, a 12 Gbits/s PRB signal was obtained for each tooth channel with proper post-processing and passed the NIST Special Publication 800-22 statistical tests. The chaotic microcomb covered a wavelength range from 1430 to 1675 nm with a free spectral range (FSR) of 100 GHz. Consequently, the combined random bit sequence could achieve an ultra-high rate of about 4 Tbits/s (12 Gbits/s × 294 = 3.528 Tbits/s), with 294 teeth in the experimental microcomb. Additionally, denser microcombs were experimentally realized using an integrated resonator with 33.6 GHz FSR. A total of 805 chaotic comb teeth were observed and covered the wavelength range from 1430 to 1670 nm. In each tooth channel, 12 Gbits/s random sequences was generated, which passed the NIST test. Consequently, the total rate of the PRB was approximately 10 Tbits/s (12 Gbits/s × 805 = 9.66 Tbits/s). These results could offer potential chip solutions of Pbits/s PRB with the features of low cost and a high degree of parallelism.","PeriodicalId":12685,"journal":{"name":"Frontiers of Optoelectronics","volume":"16 1","pages":"24"},"PeriodicalIF":5.4,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10516829/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41101839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy-efficient integrated silicon optical phased array. 节能集成硅光学相控阵。

IF 5.4 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-09-22 DOI: 10.1007/s12200-023-00076-1

Huaqing Qiu, Yong Liu, Xiansong Meng, Xiaowei Guan, Yunhong Ding, Hao Hu

{"title":"Energy-efficient integrated silicon optical phased array.","authors":"Huaqing Qiu, Yong Liu, Xiansong Meng, Xiaowei Guan, Yunhong Ding, Hao Hu","doi":"10.1007/s12200-023-00076-1","DOIUrl":"10.1007/s12200-023-00076-1","url":null,"abstract":"An optical phased array (OPA) is a promising non-mechanical technique for beam steering in solid-state light detection and ranging systems. The performance of the OPA largely depends on the phase shifter, which affects power consumption, insertion loss, modulation speed, and footprint. However, for a thermo-optic phase shifter, achieving good performance in all aspects is challenging due to trade-offs among these aspects. In this work, we propose and demonstrate two types of energy-efficient optical phase shifters that overcome these trade-offs and achieve a well-balanced performance in all aspects. Additionally, the proposed round-spiral phase shifter is robust in fabrication and fully compatible with deep ultraviolet (DUV) processes, making it an ideal building block for large-scale photonic integrated circuits (PICs). Using the high-performance phase shifter, we propose a periodic OPA with low power consumption, whose maximum electric power consumption within the field of view is only 0.33 W. Moreover, we designed Gaussian power distribution in both the azimuthal ([Formula: see text]) and polar ([Formula: see text]) directions and experimentally achieved a large sidelobe suppression ratio of 15.1 and 25 dB, respectively.","PeriodicalId":12685,"journal":{"name":"Frontiers of Optoelectronics","volume":"16 1","pages":"23"},"PeriodicalIF":5.4,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10516849/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41101838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of phototherapy of Alzheimer's disease during sleep and wakefulness: the role of the meningeal lymphatics. 睡眠和清醒时阿尔茨海默病的光疗机制：脑膜淋巴管的作用。

IF 5.4 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-09-18 DOI: 10.1007/s12200-023-00080-5

Semyachkina-Glushkovskaya Oxana, Shirokov Alexander, Blokhina Inna, Fedosov Ivan, Terskov Andrey, Dubrovsky Alexander, Tsoy Maria, Elovenko Daria, Adushkina Viktoria, Evsukova Arina, Telnova Valeria, Tzven Anna, Krupnova Valeria, Manzhaeva Maria, Dmitrenko Alexander, Penzel Thomas, Kurths Jürgen

{"title":"Mechanisms of phototherapy of Alzheimer's disease during sleep and wakefulness: the role of the meningeal lymphatics.","authors":"Semyachkina-Glushkovskaya Oxana, Shirokov Alexander, Blokhina Inna, Fedosov Ivan, Terskov Andrey, Dubrovsky Alexander, Tsoy Maria, Elovenko Daria, Adushkina Viktoria, Evsukova Arina, Telnova Valeria, Tzven Anna, Krupnova Valeria, Manzhaeva Maria, Dmitrenko Alexander, Penzel Thomas, Kurths Jürgen","doi":"10.1007/s12200-023-00080-5","DOIUrl":"10.1007/s12200-023-00080-5","url":null,"abstract":"With the increase in the aging population, the global number of people with Alzheimer's disease (AD) progressively increased worldwide. The situation is aggravated by the fact that there is no the effective pharmacological therapy of AD. Photobiomodulation (PBM) is non-pharmacological approach that has shown very promising results in the therapy of AD in pilot clinical and animal studies. However, the mechanisms of therapeutic effects of PBM for AD are poorly understood. In this study on mice, we demonstrate that photodynamic effects of 5-aminolevulenic acid and laser 635 nm cause reduction of network of the meningeal lymphatic vessels (MLVs) leading to suppression of lymphatic removal of beta-amyloid (Aβ) from the right lateral ventricle and the hippocampus. Using the original protocol of PBM under electroencephalographic monitoring of wakefulness and sleep stages in non-anesthetized mice, we discover that the 7-day course of PBM during deep sleep vs. wakefulness provides better restoration of clearance of Aβ from the ventricular system of the brain and the hippocampus. Our results shed light on the mechanism of PBM and show the stimulating effects of PBM on the brain lymphatic drainage that promotes transport of Aβ via the lymphatic pathway. The effects of PBM on the brain lymphatics in sleeping brain open a new niche in the study of restorative functions of sleep as well as it is an important informative platform for the development of innovative smart sleep technologies for the therapy of AD.","PeriodicalId":12685,"journal":{"name":"Frontiers of Optoelectronics","volume":"16 1","pages":"22"},"PeriodicalIF":5.4,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10507004/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10653468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Generation of dual and quad-optical frequency combs in the injected radiation free mode-locked frequency-shifted feedback laser. 注入辐射自由锁模移频反馈激光器中双光和四光频率梳的产生。

IF 5.4 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-09-15 DOI: 10.1007/s12200-023-00079-y

Sergey N Mantsevich, Ekaterina I Kostyleva, Andrey N Danilin, Vladimir S Khorkin

{"title":"Generation of dual and quad-optical frequency combs in the injected radiation free mode-locked frequency-shifted feedback laser.","authors":"Sergey N Mantsevich, Ekaterina I Kostyleva, Andrey N Danilin, Vladimir S Khorkin","doi":"10.1007/s12200-023-00079-y","DOIUrl":"10.1007/s12200-023-00079-y","url":null,"abstract":"The results of an optoelectronic system-frequency-shifted feedback (FSF) laser experimental examination are presented. The considered FSF laser is seeded only with optical amplifier spontaneous emission (ASE) and operates in the mode-locked regime, whereby the output radiation is sequence of short pulses with a repetition rate determined by the delay time in its optical feedback circuit. In the frequency domain, the spectrum of such a pulse sequence is an optical frequency comb (OFC). These OFCs we call initial. We consider the possibility of tunable acousto-optic (AO) dual and quad-comb frequency spacing downconversion in the FSF laser seeded with ASE and operating in the mode-locked regime. The examined system applies a single frequency shifting loop with single AO tunable filter as the frequency shifter that is fed with several radio frequency signals simultaneously. The initial OFCs with frequency spacing of about 6.5 MHz may be obtained in the wide spectral range and their width, envelope shape and position in the optical spectrum may be tuned. The dual-combs are obtained with a pair of initial OFCs aroused by two various ultrasound waves in the acousto-optic tunable filter (AOTF). The dual-combs frequency spacing is determined by the frequency difference of the signals applied to the AOTF piezoelectric transducer and can be tuned simply. The quad-combs are obtained with three initial OFCs, forming a pair of dual-combs, appearing when three ultrasound frequencies feed the AOTF transducer. The quad-combs frequency spacing is defined by the difference between the frequency spacing of dual-combs. Quad-combs with more than 5000 spectral lines and tunable frequency spacing are observed. The successive frequency downconversion gives the possibility to reduce the OFC frequency spacing form several MHz for initial OFC to tens of kHz for quad-combs.","PeriodicalId":12685,"journal":{"name":"Frontiers of Optoelectronics","volume":"16 1","pages":"21"},"PeriodicalIF":5.4,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10504223/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10309567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Photonic generation of ASK microwave signals with SSB format. SSB格式ASK微波信号的光子生成。

IF 5.4 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-07-24 DOI: 10.1007/s12200-023-00075-2

Weilei Gou, Yuan Yu, Xinliang Zhang

{"title":"Photonic generation of ASK microwave signals with SSB format.","authors":"Weilei Gou, Yuan Yu, Xinliang Zhang","doi":"10.1007/s12200-023-00075-2","DOIUrl":"https://doi.org/10.1007/s12200-023-00075-2","url":null,"abstract":"Optical beating is the usual approach to generation of microwave signals. However, the highest frequency achievable for microwave signals is limited by the bandwidths of optoelectronic devices. To maximize the microwave frequency with a limited bandwidth of a photodetector (PD) and relieve the bandwidth bottleneck, we propose to generate microwave signals with the single sideband (SSB) format by beating a continuous wave (CW) light with an optical SSB signal. By simply adjusting the frequency difference between the CW light and the carrier of the optical SSB signal, the frequency of the generated microwave SSB signal is changed correspondingly. In the experiment, amplitude shift keying (ASK) microwave signals with the SSB format are successfully generated with different carrier frequencies and coding bit rates, and the recovered coding information agrees well with the original pseudo random binary sequence (PRBS) of 27 - 1 bits. The proposed approach can significantly relieve the bandwidth restriction set by optoelectronic devices in high-speed microwave communication systems.","PeriodicalId":12685,"journal":{"name":"Frontiers of Optoelectronics","volume":"16 1","pages":"20"},"PeriodicalIF":5.4,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10366055/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9928896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Picosecond dissipative soliton generation from an ytterbium-doped fiber laser based on a BP/SnSe₂-PVA mixture saturable absorber. 基于 BP/SnSe2-PVA 混合可饱和吸收体的掺镱光纤激光器产生皮秒耗散孤子。

IF 4.1 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-07-19 DOI: 10.1007/s12200-023-00074-3

Yuting Ouyang, Jiayu Zhang, Wanggen Sun, Mengxiao Li, Tao Chen, Haikun Zhang, Wenjing Tang, Wei Xia

引用次数: 0

χ⁽²⁾ nonlinear photonics in integrated microresonators. 集成微谐振器中的χ(2) 非线性光子学。

IF 4.1 3区工程技术

Frontiers of Optoelectronics Pub Date : 2023-07-17 DOI: 10.1007/s12200-023-00073-4

Pengfei Liu, Hao Wen, Linhao Ren, Lei Shi, Xinliang Zhang

引用次数: 0